libosmocoding: migrate transcoding routines from OsmoBTS
There are some projects, such as GR-GSM and OsmocomBB, which would
benefit from using one shared implementation of GSM 05.03 code. So,
this commit introduces a new sub-library called libosmocoding, which
(for now) provides GSM, GPRS and EDGE transcoding routines, migrated
from OsmoBTS.
The original GSM 05.03 code from OsmoBTS was relicensed under
GPLv2-or-later with permission of copyright holders (Andreas Eversberg,
Alexander Chemeris and Tom Tsou).
The following data types are currently supported:
- xCCH
- PDTCH (CS 1-4 and MCS 1-9)
- TCH/FR
- TCH/HR
- TCH/AFS
- RCH/AHS
- RACH
- SCH
Change-Id: I0c3256b87686d878e4e716d12393cad5924fdfa1
diff --git a/include/osmocom/coding/gsm0503_parity.h b/include/osmocom/coding/gsm0503_parity.h
new file mode 100644
index 0000000..540124a
--- /dev/null
+++ b/include/osmocom/coding/gsm0503_parity.h
@@ -0,0 +1,13 @@
+#pragma once
+
+#include <osmocom/core/crcgen.h>
+
+const struct osmo_crc64gen_code gsm0503_fire_crc40;
+const struct osmo_crc16gen_code gsm0503_cs234_crc16;
+const struct osmo_crc8gen_code gsm0503_mcs_crc8_hdr;
+const struct osmo_crc16gen_code gsm0503_mcs_crc12;
+const struct osmo_crc8gen_code gsm0503_rach_crc6;
+const struct osmo_crc16gen_code gsm0503_sch_crc10;
+const struct osmo_crc8gen_code gsm0503_tch_fr_crc3;
+const struct osmo_crc8gen_code gsm0503_tch_efr_crc8;
+const struct osmo_crc8gen_code gsm0503_amr_crc6;